{
  "manageEntity": {
    "action": "Save",
    "entityId": "2052549399",
    "entityType": "Track",
    "nonce": "0xe1dc5addae615ef46aaf2a47215a8d6b9e6e98543b061b2fa7c406241ae3e3ac",
    "signature": "0xd2da896ec675cc6132cef05412703bfa9b95211570e19fdd6c22eaf1cda9a805681769e3bbc5838ac23245215c994e0828c7a95446bc67c0cfbbb9222063f1601c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}