{
  "manageEntity": {
    "action": "Save",
    "entityId": "398154070",
    "entityType": "Track",
    "nonce": "0x98fd3c85888b2100404476d9274eeaf37ec1ca9d684130fd9e0c20b7e2f8c6b8",
    "signature": "0xb7deb81e61beaf2e26f6c6c80f6912479d8f33de0d6e4926fcc0990194f63352342c540f86a24b97c844883d174b42d6b36482651489fc0bb55144286c7450a51c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}