{
  "manageEntity": {
    "action": "Save",
    "entityId": "1988885497",
    "entityType": "Track",
    "nonce": "0xa7533a810a70fd8c086bf5fe7df72f0ea494d19577270e434d3f9820b7f17789",
    "signature": "0xe517f5edc8cc77602f8e710767da195848bfbf1a4df73e958c9a5ee495b8974e09b85722c005a0ba099dc6044f12b244441b113a98f269036957104708d6466e1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}