{
  "manageEntity": {
    "action": "Save",
    "entityId": "2021440186",
    "entityType": "Track",
    "nonce": "0xe431931b76281a709e598520881b6f414c9cb3a3d128e8f9ef1c62a7af3b6c61",
    "signature": "0x60a70d794f3d9e891f7359a10fec956b6a81c9ba95dcaa12aac789d84868f22156fee59a4c9c22b08753f3075b3779b71d880ac3126ec6c67123a4787358f53f1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}