{
  "manageEntity": {
    "action": "Save",
    "entityId": "1508388206",
    "entityType": "Track",
    "nonce": "0xfd20fd0f9737c391734cfcafb0ab6bf01ad84d9da5da02b007d767231514262e",
    "signature": "0x6c67d85e73302c612a11ffb8c4446a3b236005736a22e62cc0fbb85a1db119550f15e717f61dc418c945e4f50e02fbbbd29db0c4f08112e14187817a0902f2841b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}