{
  "manageEntity": {
    "action": "Save",
    "entityId": "519328384",
    "entityType": "Track",
    "nonce": "0x2247532f9304e20c07f67a83f023112e6af10f9270ab0b24020ba536c2979f4b",
    "signature": "0x256db761b988f5aee4e7dc2e8cd14f6c89227154e5ca8ef8e693b5e3f1544dd547045b39ee1ef5fcf2c3d167242e473464f7d6a774da55545a1b8497c9f15e501c",
    "signer": "0x6AAB6EaEa3f7F15750b649C269b0391dcB19dEeb",
    "userId": "92019297"
  }
}