{
  "manageEntity": {
    "action": "Save",
    "entityId": "860486",
    "entityType": "Track",
    "nonce": "0x2b7d841304b8c4f04cf09370539647b7be99c640b6b3134e38d29a22ce0d63a3",
    "signature": "0x26dfd6576a9aa2391b7a22ea1489b0872a333c8e7bb1842e5c1b3d37a214fa1f3f6c75de82fe7f56fdfa3891e6f7978be502edbea81c8435d59d5126f85bba991b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}