{
  "manageEntity": {
    "action": "Save",
    "entityId": "827707552",
    "entityType": "Track",
    "nonce": "0x45c97c856b2b6379f40141af624a72b304e74e1d7c1a2c630a81c358c818f9d2",
    "signature": "0x514fe8fb37a86a788a728ac637791f3d3cbb325fe2b662b53335b5a80b67e2b37387e984bfc7225f9168d0036c687550c9568d49356de376d0152167a0004f751c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}