{
  "manageEntity": {
    "action": "Save",
    "entityId": "1195702615",
    "entityType": "Track",
    "nonce": "0xcc73e6962cf06c5e6a16058ba40ac33cdefa2250b624521c4da722ab086d0928",
    "signature": "0x9a40f47dac403febbbdaaa1df21aede4a4aff5fea1c85b0f1d3c13fa5b73c77b56c1ad2a3c9a50613f41d3d6f109e58215b934a58bcb820d8cba700827301d4d1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}