{
  "manageEntity": {
    "action": "Save",
    "entityId": "882271437",
    "entityType": "Track",
    "nonce": "0x5393a636e17677a5c30762722f4544905b055aa358b019a19e457eb54918c382",
    "signature": "0xde94b1b6e02bdaee65daa063ab8ffa13c00ee24124deb1e7399923721f3aac1e2d52d6443a728f521779299eddc58f66c7c341eb0c20b55d6148a3e5d9d105701c",
    "signer": "0xc0621be31c1D1B62b94F2d48eE34dD3c3dA9D57d",
    "userId": "161438318"
  }
}