{
  "manageEntity": {
    "action": "Save",
    "entityId": "273616",
    "entityType": "Track",
    "nonce": "0xa2171a2f1c982ce78e9d1877c97ac0ab7852ea62f41fb292616ecb351138da80",
    "signature": "0x431d95350b5b9ee36ed3e306106a4b8b71fffe73fddd1b3ad5f722746160d97c1168dd0eec245f023074eb47b17cbc6eb697c672ed43e600fbb8deb80c99cc301b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}