{
  "manageEntity": {
    "action": "Save",
    "entityId": "1708207266",
    "entityType": "Track",
    "nonce": "0xdf465ca2a89a94ae151de2fa2896b1f56f31661ebdec55fbadf0230cee56734f",
    "signature": "0x436b3fa435a9638b8d53caba8865a49654cbafd6623bf6147ba5d94c1cc2ee9519065bee122d4cf1255b9eea9775303cb01afb5c6ef88f658c9522de8db9777a1c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}