{
  "manageEntity": {
    "action": "Save",
    "entityId": "917012337",
    "entityType": "Track",
    "nonce": "0xe6de07113490612a4c297d7c37e020bab03ecf146f6fbc0f6af8648bc8ce44a1",
    "signature": "0xeb27f18a6f6eb8cabcb7b174540aef362c6a29fccfa728ddc9a1908b0d695f5271de060fd5a3a31cdd698c3d05a66f06adbffccd0aa3f1dd34f48550d07a4c3a1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}