{
  "manageEntity": {
    "action": "Save",
    "entityId": "1724842139",
    "entityType": "Track",
    "nonce": "0x3af9f2129b2ca21e0f772d3e96944c81449f913405de313e52a3381dbdaa42f8",
    "signature": "0x2a23f3d8ec66f53d74452bf8311128113c890df3ffe0f66b02e3723829d03f600d78bfd589556c509b7e4182ca617d3914cd11aa21c8e644325fed3d6b17a70e1c",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}