{
  "manageEntity": {
    "action": "Save",
    "entityId": "694392361",
    "entityType": "Track",
    "nonce": "0x69a1a990f734ca487cac76dbe8c9e31aa80f5de65fedd9065d6d39ffb1ee7e4c",
    "signature": "0x89d199caedcb9fbf1e15361c32680f0ee6beaee80aefbd13f7462bec8baf22f52fdfac214e9f879b90262b34c206fb1d8f1550cbf7ba002373414cb69428e9b11c",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}