{
  "manageEntity": {
    "action": "Save",
    "entityId": "1583214378",
    "entityType": "Track",
    "nonce": "0x21e1865df4bf77aecbb554639e30e07baee1222d74d4fd74814bc056f0356118",
    "signature": "0xc43fd1c9edfe0452334f0f0763d080f2e24a550600621397cbfae2457c44d7d20d7725f0d79efd0d21836acdaaebbb0b585ec8bc9c43e3e3a3d788f4b29a6c6d1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}