{
  "manageEntity": {
    "action": "Save",
    "entityId": "483707648",
    "entityType": "Track",
    "nonce": "1792687230021532856",
    "signature": "0xec12b69c2c6c8a36db44e9c94a47ad65e908cc1aa37547830e1617f60a2cfa707287e03ff08cd4a95c5f19e1a41baade83f28a6951ac8189fb6ad813be5973771c",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}