{
  "manageEntity": {
    "action": "Save",
    "entityId": "977524793",
    "entityType": "Track",
    "nonce": "0xeeb66f4d53b05696306d86a3e1e2e262efed3f9ccf4f42b561044ea331e104c1",
    "signature": "0x07bffbe699cce8d7896e8959daf61e107a21b73b3b26a62832d63baded56616a69036e62a8462f5b713d51d731142440fad40712feaa62e073a370c3bce30f281b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}