{
  "manageEntity": {
    "action": "Save",
    "entityId": "1928285955",
    "entityType": "Track",
    "nonce": "0x918b822a76e724f1e777036507ff219f9684499d1bfedcdb8d5c97b75c57021f",
    "signature": "0x3aa8b194ee3eafc51eff327eb2bac2e1e38820a88b7e8e6d1a3a8e4b28c325b37ab6fd3c21078271aa92db2ff11b3b7e8278654f561df5c00d284b88ef8d68271b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}