{
  "manageEntity": {
    "action": "Save",
    "entityId": "1047176350",
    "entityType": "Track",
    "nonce": "0x1ebc3cb828a3dab7779e03cbbd8f1e28268004db9d92e723abffa98184514233",
    "signature": "0xf611c039b32d79125720a33ebc6672fedb247c080c17b005d1cd201b45b569f9021c1ffa5243dbb71e6e9660ca4972aadaaf3c3da74dec848ef117d01ae6daaf1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}