{
  "manageEntity": {
    "action": "Save",
    "entityId": "591080",
    "entityType": "Track",
    "nonce": "0x1cfd39385655e70cf0996677628bd1ef542e4814290f6f64ed402b784a6f8ca0",
    "signature": "0x16932d0d606f918499f0972ec42b3c4abcba43933cabe70bc55e5702671f668b610063f5870d357506dbb226bc04954bfc2f42641503b886c024301b7a4e2f611b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}