{
  "manageEntity": {
    "action": "Save",
    "entityId": "1794399939",
    "entityType": "Track",
    "nonce": "0x57624c2fce69869c65ea2f15ee2b1a3a34d31ce2b2b00ceb2d667582b5b7a4f1",
    "signature": "0x4a4314e05eec3228da0e04f76ee3a10f4dffc36fffdeb65fcec3e4204e68515156b27dc7bcdc84478b1011e105db197ad69b4997cf12ce75e4da1d6af42f29091b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}