{
  "manageEntity": {
    "action": "Save",
    "entityId": "1630604771",
    "entityType": "Track",
    "nonce": "0x1ef65d0a3e25eb9f5ff421390cd7047c12466ec8934833eb1759291f00ef97a0",
    "signature": "0x3d9789fe5917cde3bfe94e0ab727873b23b053d74458fda2b993c37aeba4d2884c4e94d91029b3e873c5603ddb49e6ce1bfe88a67036da9fffc4fe78485d83991c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}