{
  "manageEntity": {
    "action": "Save",
    "entityId": "1780774284",
    "entityType": "Track",
    "nonce": "0x3255e0a0f36b58a025276935c13211eea63f993eedddcbdbe58404cf97271019",
    "signature": "0xb519b0644fe83555b6d16c7a2ce52f9244f749bc64be791cb5bee618ba5e0d942e05ce106e88731e1bb3823115eb1fe920602866bafb80faff82eaf5d056ee591b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}