{
  "manageEntity": {
    "action": "Save",
    "entityId": "609956366",
    "entityType": "Track",
    "nonce": "0x316dcbc91f1b690ba3c66b6f2f45e3489ebc9cb98f4a1183b7ddcbd730409125",
    "signature": "0x6d9e22300fbdffab229b3414f47bd4b6b351ce17cb054d43286955fa7d718c687e471e6b11e1c7f5313ffafe36e71804e8b087450020f5278ec7a3ab3f3c8c441c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}