{
  "manageEntity": {
    "action": "Save",
    "entityId": "100434900",
    "entityType": "Track",
    "nonce": "0x63aed7e34e85c8286bbce0ccc2d7213ff8ab38ee25b496eb72c8aafab355ca55",
    "signature": "0x9f16217ba7a91de863b152d1cf3cbe0e4dcbdb65fb0be0de6c2c85a04a52f880071026b81243132a5748407ad8f6777bc89f162c1644a5c5c97489e1afe9fcf11b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}