{
  "manageEntity": {
    "action": "Save",
    "entityId": "1497640645",
    "entityType": "Track",
    "nonce": "1791361752513831589",
    "signature": "0x2a576b18e2a2ce14605da3c7aad0ae9fc9072760e8c5cf1ae10304a319abb7b514d5ecad219078f962771c9a1c5677fbe43816ee812e66131c60ea7d0fc6632f1b",
    "signer": "0xE9e5656ce6F7Fe41FDbCA982901407eB55765cD3",
    "userId": "670307808"
  }
}