{
  "manageEntity": {
    "action": "Save",
    "entityId": "952671",
    "entityType": "Track",
    "nonce": "0x9931a4987ff80b496bde218cc29d6942b283d3ccb6af87cb30a50357dd1fba62",
    "signature": "0x14ae63e5e49aa3ceaceb39d071585fe3f4d77c03ad1120c5a47f2f1a28e150c65c23e3099faa2ce1855cdad38df3b73d0d4ad0d881b8abb923423d409f00dc1f1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}