{
  "manageEntity": {
    "action": "Save",
    "entityId": "154641",
    "entityType": "Track",
    "nonce": "0xfb2c767c5d2362b37b92b01437c4356aaf09fd2915c4c7f59acc8b5d0e546668",
    "signature": "0xce13f4e770ea734737f4be9495d97707155f7ba83c98bec465b77cf92a48186962c0c646e85d398dd7e094fbb312730a9079a408d2ced6e09003a02106251ae61b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}