{
  "manageEntity": {
    "action": "Save",
    "entityId": "1813995145",
    "entityType": "Track",
    "nonce": "0xb0984aa79859f3ec92bacc42e830b974d3ebdceae4a2dc5538d5bfa8a657fdf6",
    "signature": "0x78bb51502af2fbb0c1cb09e59f456195c2c9430c46f5a69c2fee6515836d12a277ef8c255f55b2ba2f07c7bb6e87908d21ca7b7691db7ceb0e623e8e7363c3dc1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}