{
  "manageEntity": {
    "action": "Save",
    "entityId": "1065301",
    "entityType": "Track",
    "nonce": "0x858a507cbbb3ba74eab1f35d8f8e699f2fed02a76448cbb5d2bce7fa05b78181",
    "signature": "0xcdb5f0b91601da6a52013609bf659cbd9958c870eb3dd5643e14273d1ce4094a7f37093a512c3670f2ee18458fc4a09dfa7e1bb17bbe888809f4905bfd19871c1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}