{
  "manageEntity": {
    "action": "Save",
    "entityId": "1595576025",
    "entityType": "Track",
    "nonce": "0x8712f84dcebab5e93fe8ea424aa07da0ac84eaca57c99e759084c2e161e43be4",
    "signature": "0x12a07a1ce714b61e27f2b1ed1c718a3eea519739ff8d62f757d6d9c827be6bdc265e4c31e8c8dd83b754be7cfac1f5ea28161e9c0363258f27782812c6abb7241b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}