{
  "manageEntity": {
    "action": "Save",
    "entityId": "313222306",
    "entityType": "Track",
    "nonce": "0xddd22440aaeba23d8ffc7f31b19b43daa54dff3291f7d1964b75b2d7b5a88d17",
    "signature": "0x2cc199144c7e27ba4e241b8358be9ff72422a9030bcde3ba457b741f381721f116eb9f3e610384e4217c71aa0f6f119a3708d031c715ffc5a4fa8e5dcc364a131b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}