{
  "manageEntity": {
    "action": "Save",
    "entityId": "501436210",
    "entityType": "Track",
    "nonce": "0x2a9c0fd32a745411ba16e67c7550cac341cdb2bb6a394cd0483cd1e97b7f2a29",
    "signature": "0xc2d7b8112a2c91acc34efe177b64a4e169d746a778f9716742cfb5d5fe3a9b293a1d2153c7884f3a3ade71acb190aeabe8f598520bd439488681c3726b7f11be1b",
    "signer": "0x5bBd3715DF4fE9E1162E48f5E58d1f53928a5D3A",
    "userId": "346245555"
  }
}