{
  "manageEntity": {
    "action": "Save",
    "entityId": "1446142025",
    "entityType": "Track",
    "nonce": "0x377b854b15e05dbc04ff9df8da6bc610448a605cf9c899d1532bb6c687ea4e8d",
    "signature": "0x8d8072a54772e5fb49068b06da9e2e59c856285d3676fce7b6c77074bc367736570face0594da8d9f6b457f8c37d1c5e0c7da6ae0d7a65c8b3afcaa35a329d491c",
    "signer": "0xC3282ecFbfe510508c31Bf381F5c8483238EF911",
    "userId": "959683593"
  }
}