{
  "manageEntity": {
    "action": "Save",
    "entityId": "1263287360",
    "entityType": "Track",
    "nonce": "0x720ebf45920b8cc9e05af5bc80f3db7aa1593a948c050f6c5d71c37b67a3267b",
    "signature": "0x1a74ccd96132c81a09439c7ee33f04357970b926da0f5e3c8ea6f7a3a08d14f7756a89753ccb8b4d327a48d177ed3aea633efc9b6f753c7013646b0e8f3f1e241c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}