{
  "manageEntity": {
    "action": "Save",
    "entityId": "755023254",
    "entityType": "Track",
    "nonce": "0xf64f0a0ea2108a4359d1a895b787a8e94f1e05ef873dbadc01c0ca5518362507",
    "signature": "0xa597b012a88e19582aa82aadf987ba035cfdd81bd027a852da4ce1cab5c3616252d2de727d0a00b30d5a09b74670a690fdfe02b1d1748d0cb6f80db94efbdee21c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}