{
  "manageEntity": {
    "action": "Save",
    "entityId": "1318336198",
    "entityType": "Track",
    "nonce": "0x8d14575de2ad92e1ff5434b71073ff3d3e99a0a74db5b477ba7ed1d0bb486238",
    "signature": "0xe1ce814cdb52ebac8bace7407d3334d630072fbf79416135732e6b4330b67aea23b837326f32d8a40558b01229702a29003b77fc6dc8b3cdee9b7409039835831c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}