{
  "manageEntity": {
    "action": "Save",
    "entityId": "1825947688",
    "entityType": "Track",
    "nonce": "0xcf5f0b4ad285c7c637e21877044caf4a08a7d4c15c848b7e8b5f55ecf82bbd1d",
    "signature": "0xa770cad316ff5bbb6f72f12c051fd760c9b2a71b5cedece59db937f7a6bd3c552946e5b27e8b835898c3d989329b94b729459fe12836f4dc1c9249042732b0a31c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}