{
  "manageEntity": {
    "action": "Save",
    "entityId": "480377875",
    "entityType": "Track",
    "nonce": "0xdc25b28e7fc3f4930974d51e2bbf218cd6d25d516a08815638d4c0bb5ca4b895",
    "signature": "0xb186c1ad088dfda0c5b9d5205c1c5c980c6fd5ee1ae465467cd40bc9c7578d9144304f4027ab16088d39b9ef425dbe6eaaf852f0bd21897a93d1d78f06c6f4821b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}