{
  "manageEntity": {
    "action": "Save",
    "entityId": "101887065",
    "entityType": "Track",
    "nonce": "0x0a89b5f8333646d2dac914b4ac445c7247f5f4382b26229557ef7b4623384b6a",
    "signature": "0xebef8095868c5d8f403155fa82c399f1cca230eb602a902e4ad2148244a33c9a7c6dd6706d538351dcdcc300f2dfd69cbb3208de940ff0e7b5fe7ea4657551751c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}