{
  "manageEntity": {
    "action": "Save",
    "entityId": "1517910444",
    "entityType": "Track",
    "nonce": "0x25d2b4429b31070125686b39b5c3d6b30862eca0262fc871643cd28876c18858",
    "signature": "0xceebf4b828d43b47d3b1035ff29ff66486df799ae2d2c56215e967ab70c9bb2f08fc51b6faab4af55d04b86df3ceb65dbc6450c4afa636952c9dbf7d3c00ca041b",
    "signer": "0xd14727622fa26ECD6Ad72cADB6b96823f5fb65DD",
    "userId": "173494086"
  }
}