{
  "manageEntity": {
    "action": "Save",
    "entityId": "629945776",
    "entityType": "Track",
    "nonce": "0xe3ae8c84de99bcee95cfc652cde713b36f0d626b0ab425b39ac5e072c6c72fdf",
    "signature": "0xa7da340c07595083525b82e3df3a1ac63a4a994c8c5e28d44c14c4475094619a45dde205c623ae5d088cf86bf869ba14bf90270b07cc20a1039c79f615c2b58e1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}