{
  "manageEntity": {
    "action": "Save",
    "entityId": "1304072212",
    "entityType": "Track",
    "nonce": "0x707ba2bf31ddc03d6b139ffd1652a9a422ce3603f8cd3c3f3fb4dd7a51017460",
    "signature": "0x3bf85624c6b4927c90be400a86da88967a5efb5c83c478d38c2f0a3790164098559eda07b1542b080a901448f531b803fd63948a7d69312d3fa3c3d98118877f1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}