{
  "manageEntity": {
    "action": "Save",
    "entityId": "1143942217",
    "entityType": "Track",
    "nonce": "0x6b64ab68011074b2d488bc7e51f25ab697abf46615b99f0c44ae4ea71472531b",
    "signature": "0xef743c1b84a01d912ce641068dab0808d4a57e99be6cfd007173acb67b386e1e1f46113d0dd12bb18b28eb8acb862d0a4e93c482d076eeba1293d37afe1b207a1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}