{
  "manageEntity": {
    "action": "Save",
    "entityId": "1629822809",
    "entityType": "Track",
    "nonce": "0x3f2a08405f6fea1fbfdbca414a625e656c7f461bfb1bc8c29e2716ae4c24d210",
    "signature": "0xe7d6e6ef1a28a88f7cfb78b57b110a861e617f36f292d3770a12393c42f0d10f4e92068858f9039f1647a36cd4b3b2d251f5830a9c75ced61465793f3724e1481b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}