{
  "manageEntity": {
    "action": "Save",
    "entityId": "694732262",
    "entityType": "Track",
    "nonce": "0x1b79461d9260a64e682e21c1204ea1dfa9d14bc840cb87009a21108cffe5a790",
    "signature": "0x1f0b89a6ca4324301ba72fa42c74399178f157683c434af6aabba271ac36e07d6d6abe01ea3e17a57d4690f30675f16563dc010760d1a640f11143eb65753e081b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}