{
  "manageEntity": {
    "action": "Save",
    "entityId": "1844643630",
    "entityType": "Track",
    "nonce": "0xa5ddc037b75145c25a1b910536c477f8b7d577a61d9898ccddf08a4abe73c70b",
    "signature": "0x267070cb0cc24ab0fbf854361bfd356f39d412ce124aa6061b6bacd6ee3481755b9a570f5ce8e66355150cf2ad11655f43da29502d9193e9c57486146c60099d1c",
    "signer": "0x9c3B758948f27dCECee5f39438D5E15d6e82FB67",
    "userId": "283863311"
  }
}