{
  "manageEntity": {
    "action": "Save",
    "entityId": "1906280737",
    "entityType": "Track",
    "nonce": "0x856b14b49fb85f6c7aa58067daa5c082dcb704b94e3c2afe7f4e6d8b20eed551",
    "signature": "0x410db6c05e56fd728c7b63ddbd0d8a80a39ad02ce415cf9e4581c7ed04eccba44a2a1d57ad328b1a6061a408a268a4a39817a8ca3ff6630473e2aa463bd869f71c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}