{
  "manageEntity": {
    "action": "Save",
    "entityId": "1513487485",
    "entityType": "Track",
    "nonce": "0x0c314f080d2d953f6f2572ea784598c4803b499297ed743f2baa7242d96b5f93",
    "signature": "0xb1880057ea1f1bca04db1d0777c6f07a51f044d40a597d2a18c2b65fba8cbbee3f1369731a71d9424f08842d8022cb905c6653cc1c96b0bb09c3b8b8c8eaa1991c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}