{
  "manageEntity": {
    "action": "Save",
    "entityId": "1907921731",
    "entityType": "Track",
    "nonce": "0x071ff79ec3270da31eb8569cf5b6b1050d9e0e2dc250680ac1b3327aa38c095a",
    "signature": "0x8ce11cc10b3b74fb6d0464bf982db2ea7717847f7d14ea4a2c6103bc4c89fedc213f768ebe3319886186f05556c1f6a3be25f34e78266ed1368caab1a2b80aec1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}