{
  "manageEntity": {
    "action": "Save",
    "entityId": "393625172",
    "entityType": "Track",
    "nonce": "0xb0ceedbb371147751b9ef282c86f564caad093ea9b274f8cd5761c27e5c36445",
    "signature": "0x0e44b2d08ad74d5e23bcb4cd9a0ff00afcac3c4600e01c64fd1565b74f4934d713e5d865a8ad3fbefc88e44631b706c4dddb706e47efcc841ec2908edba3d4011c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}