{
  "manageEntity": {
    "action": "Save",
    "entityId": "1275784678",
    "entityType": "Track",
    "nonce": "0x9397e8ecfabfdb0edef20b0f759b3076c7da1d59154d5aaceb7be7257fd94970",
    "signature": "0xc68d535c6b495a392e95c65af3f910dec44fe9a35b2bd6605db2f03f84891d335d5256a686da548aca8ad0ebc0924ce5ff74233d5a3860ef74dc2af4dae08aca1c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}