{
  "manageEntity": {
    "action": "Save",
    "entityId": "1624636523",
    "entityType": "Track",
    "nonce": "0x4da2fe29a8f3fe30636fcadf29c669a875d1a34c25d5b5e76ff3523fb1a48674",
    "signature": "0xaba58d1b046beb4749c71ddf431fabc785a5a5764095208c4c43a1aefa1c78c246f49fd55d8c24a74a0f07b26c525d1aea35889a412c8ab878abc99534330cd51b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}