{
  "manageEntity": {
    "action": "Save",
    "entityId": "1073856395",
    "entityType": "Track",
    "nonce": "0x8be19ffbd89a5141a954422714e54e42e21222d0fa89e03a20d71ea5979928b6",
    "signature": "0x521e4620efd45291ea36ed55e37d147331b45ecacfc81ad721f0a96818ba3cac43157a5498fa9471d4e1994f5e072de6a5538f209812fcdb60cbb436904c155e1b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}