{
  "manageEntity": {
    "action": "Save",
    "entityId": "2001436017",
    "entityType": "Track",
    "nonce": "0x9ef4ccc071656af6a5bff5d11da23e3f858a5f04492c789c185033469f491060",
    "signature": "0x3d57b95356a64aff1b77a61376883196a7896efd3515b096299d5aa7944fe7c6789448d214f2ab7bb04a1f8da716be6aaa3b19401af59b6e0ed6c064ec53b5ec1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}