{
  "manageEntity": {
    "action": "Save",
    "entityId": "1012031185",
    "entityType": "Track",
    "nonce": "0xb3950e7e921e10ba04ffdc168b8c3242c8bf6f0e55a87a2cdc91a6d6e8b8d3f5",
    "signature": "0x05b5e38c678937128d55a8d9ee05a4cbbf6c15e143a28b4f7ca958516e1b8f3a7027d6cecc605a5d5bdde788c47c9ebb616e5e4b84fe57f81e654e4423ed91a51c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}