{
  "manageEntity": {
    "action": "Save",
    "entityId": "227860",
    "entityType": "Track",
    "nonce": "0x6ebf99f1c32b2992e1b359ad301e296205216fc26ff840572bf0f7dca7efc413",
    "signature": "0x09ba4649edd6cad53c2cb220629ab96a3c2673f07f586081ec6b7d081dce7f9f353422f398b80c4799a077c9cb41a4664f643376e534b43d67e4774b2bff86d91c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}