{
  "manageEntity": {
    "action": "Save",
    "entityId": "469214",
    "entityType": "Track",
    "nonce": "0xd124220bdf5bd39673c4353598aacc9fa19f5e30e7333acfdbbc309e8306dc09",
    "signature": "0x92fbe0fc147aad4e9368d550a91563f00699737207fbbbead1b863e13f791dba443ed06c1af377edc5d33d35b00557184a9ccc18cb9e0473af5f1e35c6a047fd1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}