{
  "manageEntity": {
    "action": "Save",
    "entityId": "461298",
    "entityType": "Track",
    "nonce": "0x379b0b6d01b3d4619c0b6125903400955f204d42a43c1dde3d8c48fe5304f6b9",
    "signature": "0x04c08270d34385acb0e00f57d143e58090fffbb9cec6087364d104f7d1a4dc795ee5f0647231057c9865ea728861a2d757f7eaa7b5f7633526e04f84c45212631b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}