{
  "manageEntity": {
    "action": "Save",
    "entityId": "1810070676",
    "entityType": "Track",
    "nonce": "0xf950db75b12f3dce7cd762bcf34d1df10db23e027870f7aee1d24a59ee1401b9",
    "signature": "0x6c535344b089d82fc88b34664bd036f631c1a9f0dcc691cef7937b7b7e59cf32313f4289d809907d6af0c633ae0e0afd02c00e348393b1a63f8d30e98a4132a81c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}