{
  "manageEntity": {
    "action": "Save",
    "entityId": "1177110474",
    "entityType": "Track",
    "nonce": "0x2baa78a19dcccb0bc392d86be4666c37090ce9f494aae184d54c98c7c91387c1",
    "signature": "0x220996816150273c8385c036b89fe6e69b2369fd0bda420da4f44bc5512bdee81034bb82e8641690413f17fd34185712e856f36d4506bc2ad5314556c01ecf4c1b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}