{
  "manageEntity": {
    "action": "Save",
    "entityId": "280476725",
    "entityType": "Track",
    "nonce": "0x33a8bc8843f5d082bcb1887da0471d9e890063ad92592fef557445187016d7f2",
    "signature": "0x3902ee15f305904507be5f6d0d0af73cefcb35de37cd1a733283e59749dc31bf4b12ceefb3ffd7a601eee93193e4776f7ea106afe6ce81e95e230600c8b0f0461c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}