{
  "manageEntity": {
    "action": "Save",
    "entityId": "19434091",
    "entityType": "Track",
    "nonce": "0x462abc3f97bfb6a435c8795062b13944111eeab4afb916273d97c06b30dcc204",
    "signature": "0x90fcf9b543740272434fd4b4d673fff37da605fcfaf08d078e8ca5e08412d0a5115faa51aa9693a672b9d587b0196e29177adcfcd53c13fd6f79fac1b50794e71b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}