{
  "manageEntity": {
    "action": "Save",
    "entityId": "785269786",
    "entityType": "Track",
    "nonce": "0x0522c2b898cd76d4eca642cc4cb118e915c2bde8d44f97aa15440389bf3af293",
    "signature": "0x6bf68f55f21a2ba4e8a9fea0e562d92c5166f887b003b53bcb01b1e2549d24fd4bf99bd7f6024797975bc8341084c25534c21ad24c16e55dc6e3e6a520f7122a1c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}