{
  "manageEntity": {
    "action": "Save",
    "entityId": "1103938",
    "entityType": "Track",
    "nonce": "0x3a273b4dd3f32e448e9b541e30668ec2977395c8292b0157ccd802684aad6fcb",
    "signature": "0xff3ef29ce1337f8d622595f5ed4c580dbbdd538a466fc6a28c3060e7a2ffbf6237be7fb6b150d176ca83523618d344db8f351a34b93af33ba505b2f1274f6be31b",
    "signer": "0xd0861E53C8153F0B58Ef47509E07593Ff64905bE",
    "userId": "519642401"
  }
}