{
  "manageEntity": {
    "action": "Save",
    "entityId": "626602452",
    "entityType": "Track",
    "nonce": "0x5e1859def4af35da9d44771795f5a1cb30e9f1bca79fcaed1a621177cc208d87",
    "signature": "0x8e731463bbf2a13ddd6753c45e123debda08a6aa60b9263ee01318bff945bac87f5ef89a2c04ffed30fcd471efdb5742dae25971a8f024fda52ef1cdc8b2f7611c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}