{
  "manageEntity": {
    "action": "Save",
    "entityId": "962398019",
    "entityType": "Track",
    "nonce": "0xae1441becc410324a055dc6b10411964c3c32878320736c59a9a73942d7187e1",
    "signature": "0xbfe9508b641031736d5e7b2dad01f5f2be5334cc0919bf0652f4d9b250fbfbe32c4cf3780fef6267e817f7418f9ab0438a2f01f5f4f3280858f4c3ba1075e3ba1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}