{
  "manageEntity": {
    "action": "Save",
    "entityId": "1090577136",
    "entityType": "Track",
    "nonce": "0x121ecb40f0fdbbb4e695b272b62dd64aab6faedfa96c872c02e11dd54e4d3561",
    "signature": "0xe3436d22889c1aa4d823b6fe2431ad1171fe3cabfc97ffd899eca8a4ae69b790779992ce13522cb30f577a816d3be6e83d5896aa61987d229f9a0b6469b74c7a1b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}