{
  "manageEntity": {
    "action": "Save",
    "entityId": "1525113680",
    "entityType": "Track",
    "nonce": "0x7aac42c56c75a2d2ab4ccaf6093336862241ede12aedf724cde05e9cd26cfdff",
    "signature": "0x1bae7f5f8420aa7c45621a30d4b9effe1632cf2e98a1825414d02afe0443d0f24ab7bd6cdd0a82a957f26da19f0e87ab34ebb1c1a8821f6ec41400929b642ae41b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}