{
  "manageEntity": {
    "action": "Save",
    "entityId": "1034789",
    "entityType": "Track",
    "nonce": "0x11a6e10537f99861756fe148042c9fad87d63d79d2db5855f8e61fa0baa8de9d",
    "signature": "0x87964a09f9d30cc4445765e2da9f841eb69421858b8920158b3fb81149c043a210859c8e64795b7477617448096ad3427f482abd6254f48898de2b2245fd0f451b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}