{
  "manageEntity": {
    "action": "Save",
    "entityId": "208105",
    "entityType": "Track",
    "nonce": "0x71acbd60a94af11f5601f390cdc879a99f41022044ff2a4b96db62defab9ac94",
    "signature": "0x4fec1b261d338c9baedf266581070422556869c8a2d4d5cbfa1d17c769d9af347a1d38342ac3f0fb5866433466521f050aad0f18317b58213abd95864ebd4b651c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}