{
  "manageEntity": {
    "action": "Save",
    "entityId": "594726",
    "entityType": "Track",
    "nonce": "0x26d2833a153cf17fc7dcb8281feb627e5e71d22d8eac79ffe9091abaff8a9208",
    "signature": "0x88eb675faf37c612b113ee4fb452a5e777e0aaae67604cfbaf950374b7f08ec02211facb564622d452b59043647e0bf3b55618de47678ce88a0484c2e61c8de41b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}