{
  "manageEntity": {
    "action": "Save",
    "entityId": "968407867",
    "entityType": "Track",
    "nonce": "0x50be13fad9e675eb3a98425bfc40ea70713b3e8ced9a36c733636be8efc23323",
    "signature": "0xf88ed8f6d233c76548608c665f2769339ad4055fba1d01e9d2838a0e578b064f127edcc189d6790d05dc65483c924e57a8bb08bae10680d27f302cf5b13ad55b1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}