{
  "manageEntity": {
    "action": "Save",
    "entityId": "1139520534",
    "entityType": "Track",
    "nonce": "0x17e232a4b2cd6f21b6bdc0766dd97d539d08e466cd3101c821f5c3274c5b05da",
    "signature": "0x773b5bba86d736e4cf6a8afacb23108947778660a70633bcb42ace3138476be07005b09c392367eae1cbbf1324e31e2c0e4533dcff9874930db57d4eeb6e8e2c1b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}