{
  "manageEntity": {
    "action": "Save",
    "entityId": "769752003",
    "entityType": "Track",
    "nonce": "0x183e843160f061e084264147d433c4950daf46324bc4af0475f45bed68e777b7",
    "signature": "0x95ea4a5a7eb0c0c66df13bb455561da47d67b854566a7a984888f49fa8f6f5944bd981131be27a96227072546270585a38de1c5aa4cd9b4c1c77fa941a866d391c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}