{
  "manageEntity": {
    "action": "Save",
    "entityId": "330801774",
    "entityType": "Track",
    "nonce": "0xa06e50c1f13624983b49fe1541dc4c38fbc9b072b0d8329094c7fe86c485b538",
    "signature": "0xa57ef72c14ad16b4f1d3e99407c4e85205bd2425045be44deddd5cff7349a95668272ccb5984b2d38ab85cd3f3e78d1ac9693e6ed570afa18fc0fc94a7d204811c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}