{
  "manageEntity": {
    "action": "Save",
    "entityId": "310986",
    "entityType": "Track",
    "nonce": "0x6a24529dede9d6aed0c4429207c025024925150c0cee1c73c7fed63e533c0f6c",
    "signature": "0xe3854c59439b878315a0edee0164dcecf8c93f2d420e5a7df4c0b0fd9ce31e6845ea92f8c03ff83f911bf6157a78e60c0e64e8ef7fe946f6cdda007dc1609aeb1c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}