{
  "manageEntity": {
    "action": "Save",
    "entityId": "979852886",
    "entityType": "Track",
    "nonce": "0x6d0d8f718a79dac9adba695cb80c7af780bccc865f65ea3be77fc06eac50f437",
    "signature": "0x3b0a343fd715ce45f14d284b73f21832a9bdb11c3d3ce0fbf0615411b3b70236114af114207953191804c984eadb7a3ac179a6c342a81c258e9c4fc6d53892aa1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}