{
  "manageEntity": {
    "action": "Save",
    "entityId": "550608",
    "entityType": "Track",
    "nonce": "0x424652c6d4378afb5ed2e5d38bc1cb956bbb374ec2ea88d3563ee16ddfd32038",
    "signature": "0xa0748ff524798086fde9027a7e47a2a3003725f558372c6eb42d96a8da902df074e34148383009bf0ae168c98e78f3e7966e8b150b7f3b242b1ee7707d769ffd1c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}