{
  "manageEntity": {
    "action": "Save",
    "entityId": "1389550150",
    "entityType": "Track",
    "nonce": "0xd3d55d5a2eae2c1872c3fde85e01cd5748f9f2342e8a2c757f1424119fbc4dd6",
    "signature": "0x1f62c153777da04d6471089559e5f57d5739eb13623c8a437488dc392afe30b95393cf09b6f5319a6ef659ef96c80af7e24c245af6c718c30310d2d76984cd4d1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}