{
  "manageEntity": {
    "action": "Save",
    "entityId": "2020629369",
    "entityType": "Track",
    "nonce": "0x4a09ea27a7b896055fb45645acb4bcf67904b2d939db01fa4e8f658b412fca70",
    "signature": "0xf576c2f649d8b6bf5d7df62c1562ba409722e0190cb5f54e39d9856a22b6e66d4bbdd53ae585fcbce9d4751f2928422a2e7345db84e95c5932136f6f0e9437971c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}