{
  "manageEntity": {
    "action": "Save",
    "entityId": "634161875",
    "entityType": "Track",
    "nonce": "0xf205f8f7cc2142c6fdf8159fe5c1768045dbd21999add35cfca603929f84703e",
    "signature": "0x959540e85aa63189c8b5a1e8dc75aae1d85b80d9f965a17302126ac520c696bb6411930be3e4b280a6d09a84bb3b8efbba1a3db89c98257fe2b89f4db3ec768a1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}