{
  "manageEntity": {
    "action": "Save",
    "entityId": "160684382",
    "entityType": "Track",
    "nonce": "0x47ac6ab5b2ae86a4c29c080e1610456e943cccd3876e5d04522d94582e84de95",
    "signature": "0xe7d8db819d068cad2aa5e366ec0bfc165c17337d389fceb0a3e37a4e3bf799604f68de1a12d0c0014c8e78defbf011d2f1c335248fd93faa2368de9c032b45091c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}