{
  "manageEntity": {
    "action": "Save",
    "entityId": "1347434237",
    "entityType": "Track",
    "nonce": "0xbf17c45282a970e45e6aff2d012ab8e75356cda997a167bf5c9a62dea5add944",
    "signature": "0x4842fef60cd042f7d13a3d5a2af6c716575061c26253223c9a645cdb1c1657da7196ed556b722789167c569cf05bba25919632435e6d08c16fafda9fc2199cbc1c",
    "signer": "0xB57F94Ef9a26d73E8b35D3f37FccD18BcC7eeE00",
    "userId": "850416615"
  }
}