{
  "manageEntity": {
    "action": "Save",
    "entityId": "31713951",
    "entityType": "Track",
    "nonce": "0x4425c7ac632a9c9e9022878d8b228ed757af297bcb15d8c246a54ef367dc18ed",
    "signature": "0x4d1993cba3178507195f380dd3157f2c5b1c390f89c66b2b88dd0ca2671d2eed2376c26fe02ea59708e1875b8eb2295b83b172e59687d511f4e753694bc9e63b1b",
    "signer": "0x14FF2Ce3bf23AEeC9C140996251F6f85D8e99431",
    "userId": "53273933"
  }
}