{
  "manageEntity": {
    "action": "Save",
    "entityId": "1359396574",
    "entityType": "Track",
    "nonce": "0xa2f7cc470a39ba4148bef76bc935606348a46a918ede67f6de9084bd7a49d4d0",
    "signature": "0x1dc0a0adc2ce879ad3272d1d4ec0dd9dd5959bd728097080f2224e3760367a4a0b9a44aad8c467ab065f130c6d277bc80153aa2d43d0ff5da02604fa930929591b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}