{
  "manageEntity": {
    "action": "Save",
    "entityId": "1000254",
    "entityType": "Track",
    "nonce": "0xe761fe2caf28510df97af13d914d59a71f2866c9f0ddee67f7ec6330177e8121",
    "signature": "0xe46e667f266e7fa17213245492292d65fc367bf7606fc9f58ddc8d2f2411ec4e0b83ff7ddc2d16aae88d62e4d957fab9d04abf6d62f9715572a925b48c145ef31c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}