{
  "manageEntity": {
    "action": "Save",
    "entityId": "755216735",
    "entityType": "Track",
    "nonce": "0xd72f775d0963012b1c9d343fd45f31442ec969a279dd097c4a76c96394abd546",
    "signature": "0x14dd9f2251239ab46b4571fe63196a1ef41a16199d8eca0e6004bc319bc3d31120e28c5e3599a29d2290fe83450d2ff42e1847452d07acf0a6c6ce8730630eed1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}