{
  "manageEntity": {
    "action": "Save",
    "entityId": "51330",
    "entityType": "Track",
    "nonce": "0x647a36db73230371742ef574a7938a72a0fbf096ca6908a1bcac8af8bd96af20",
    "signature": "0x8d610af0e76a4961c0ef996850c6d19de6c72ca58f06f8c96cc8e6b3592f6f1a7bd9cdd39537e25bc60abfc8d9468105f00ed4705d641b2af86e39b49e15289f1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}