{
  "manageEntity": {
    "action": "Save",
    "entityId": "346918621",
    "entityType": "Track",
    "nonce": "0xa0d58c5c41ec34be8f071b41ff2d3c94ef2ed16dd036529c38feae1c397d28fc",
    "signature": "0x61ccc5e3c225bc47b3150bf1144b09962b585daf2baece4c5fe6d540b2a050bb1b758cfe098d56fc222fa6c444685893cdabab6ce107b56923e94f89880c50091c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}