{
  "manageEntity": {
    "action": "Save",
    "entityId": "368113661",
    "entityType": "Track",
    "nonce": "0x30c01100d51116deace7ec72aca1f0ec284558124375cce808fd7b5a641299da",
    "signature": "0x2733e430cd3af9d08f4affcd9772d5821bafb79418ef57ddfedb08121aeb83b739c9f3682d402f155c9367a9c4e73ee5d9f80afe972228c83a7cbcdd2500962e1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}