{
  "manageEntity": {
    "action": "Save",
    "entityId": "222202482",
    "entityType": "Track",
    "nonce": "0xfdda13befc0806bcf6bd87dec950da31d12e7bdb6f2744dd1051357d5048aac8",
    "signature": "0x904088e0b983a88c002feab55f81a239e7c10647b8349d5113320b25eb7a98372a13442fa92dc4dc77174c340b4468c309f175a2622d0c17c2b3bf45bb188d5c1b",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}