{
  "manageEntity": {
    "action": "Save",
    "entityId": "334292344",
    "entityType": "Track",
    "nonce": "0xace0ee8c031f5f8bf17ec280e2a914027f7eebcd60420ea8c249169cfd269c42",
    "signature": "0x60daba7f6065d8de81e2e277c7686fbf85dd0bdfc192f10977b0fd7f20b4374d3d87856500e190b0e27930148495c827bead0b70cf302bcdef1132e67a3ae5af1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}