{
  "manageEntity": {
    "action": "Save",
    "entityId": "1217221200",
    "entityType": "Track",
    "nonce": "0x23e64c07ec9796c7685b07386ee12cce7396c1ee628c0920577239d992b368b0",
    "signature": "0x5e340407746d254461e4a83d4ffeaf866879e98973918130dcad86ce2fde1c1304411d24957fc486db8cacb2ead14ff1b8ce2b274e5ce0777a4789974e642bf91b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}