{
  "manageEntity": {
    "action": "Save",
    "entityId": "723784",
    "entityType": "Track",
    "nonce": "0x50e5c8edd31c987ca9f04bca470a7960ec3d915277105008edcbf56f3efae005",
    "signature": "0x739fa8b1d0555dca59b3c2d313ee7b775eb25ba304cbdbf90468fa4e4c1e50fe2c725024b7098f7b276d514f058a6d4b2d8773f6bd8019577b522bfcafaddb491c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}