{
  "manageEntity": {
    "action": "Save",
    "entityId": "1455978009",
    "entityType": "Track",
    "nonce": "0x58010e4486b5054191deecf42197911a57a7816c42f5f1d72cac2b6a57cdf004",
    "signature": "0x92e60a7150eb5e06055e8e62b71c8bcfb696e319b34d96dd149345c11b12251002d0749c1fb5ae80e2792093ad50506e4433756a6cff6ee473f43ec5680df81e1c",
    "signer": "0x4089d1751487aA665C895419F2578a6Cf33BE481",
    "userId": "728155533"
  }
}