{
  "manageEntity": {
    "action": "Save",
    "entityId": "2086594741",
    "entityType": "Track",
    "nonce": "0x04e070dba1b0622abc2e37f8b3e398bfb31b1c33bc843635d1a077744304a9d3",
    "signature": "0x3577f1e28a82396aae1f666e9c01435f21aaa8c2855a08efef4ccdf18440a34d7e125e493da5b1db9de19d644ac6a941e3e95966be0e576756857030d8ce00211c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}