{
  "manageEntity": {
    "action": "Save",
    "entityId": "1088539",
    "entityType": "Track",
    "nonce": "0xf6c8adec58102ea4e69dedef6162270831825427975cb46fc0b17df9981e1342",
    "signature": "0x3c0250c37e321ec5c285936ee7892b5f8dcef5eb3d5a9751abc6eb214ceae52464148ec6f70c3e51155f1da92580c3dcb16e18400e47f10a78d08d2ef26819111c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}