{
  "manageEntity": {
    "action": "Save",
    "entityId": "271779218",
    "entityType": "Track",
    "nonce": "0xd253fe9b87587f5e9bbc433ea0196d1d20a7ea7a621c8c45065762ca5c68ac3f",
    "signature": "0xe1e1268e63ad2870f2297b29ee3701dc94db11301e510811da076ce44ff197dc3fb3f974e399ad7f7479085dfad917f02b8f24f15cee0f50ca093c4b5157b5c41c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}