{
  "manageEntity": {
    "action": "Save",
    "entityId": "379991482",
    "entityType": "Track",
    "nonce": "0x536630b9c945fa0f5612ada5c154eaaf001b0f0547677e286ebba8b7b3db16a1",
    "signature": "0x5db810857c4c65ab3cb8044225cb90fbd549e0ba52a9b5c91bb00f490bcf37934fc7d01fb13f61453d1230365a7ce7935bc7e5d6212be30d8c25ca566ed929a91b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}