{
  "manageEntity": {
    "action": "Save",
    "entityId": "1104012463",
    "entityType": "Track",
    "nonce": "0x2094680594a54d33082284225648c0a9c0b303154f0dc02a3341d9c79fb2001d",
    "signature": "0xd8d82e5e84191dac606c1ab22bdf6e43db12b4d8d08e2d0f6f115ae7446b6611137dc294c9ada850913b1f17a131b98bb1b3c32a90f0f0d576a236b91b397c311b",
    "signer": "0xD7c3dC9EEf2D94568C0e1A9C88b58696850c7C22",
    "userId": "125737"
  }
}