{
  "manageEntity": {
    "action": "Save",
    "entityId": "319531414",
    "entityType": "Track",
    "nonce": "0x7168a0d4127d734116b8b68be62a16747f5cd88516c6fda35fb74272c25f3dd2",
    "signature": "0xb3eddc31d0da1bf8957234695ad738e12f21b790ab235b2da08ebd19d1955e6834e1bded37ba015323b75a9de498fc4c4eb75970f8aefba372e11f8314d6497e1c",
    "signer": "0x442b56FA7fdf42Ae6c15F3A4663692903B358230",
    "userId": "142026"
  }
}