{
  "manageEntity": {
    "action": "Save",
    "entityId": "751773",
    "entityType": "Track",
    "nonce": "0x23863c50e94fe88b2be2b80f1c74d29dee50406da7d2937fbd8663fd0acb52a0",
    "signature": "0x60b0dbbd460485235ad9938e38ef704c7ef7a9a7866023396a0a109354406291247fbcdd839eb537b1d378a5b296a5865c4de402cf9ec4c1a8e16bace8512ea31b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}