{
  "manageEntity": {
    "action": "Save",
    "entityId": "938737",
    "entityType": "Track",
    "nonce": "0x3489a15e134ddc0ba47ed1b8ef9d545ae62ba0a6fceaf262a5bef5c884bba564",
    "signature": "0x0bbcced1093f5441440a7ccaf46be54e4c116b50e83cd49b06783217f23705bd6361ae1d88f0aa06d18eaf76a4f7badce37394c83161f52621e525fc83ed862f1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}