{
  "manageEntity": {
    "action": "Save",
    "entityId": "683718092",
    "entityType": "Track",
    "nonce": "0x32d39ab4d5cb75df51b56aae8de788e60a1d12b99ed30a5e5459bb35153e9c9e",
    "signature": "0xdede71b4a08d0f9205dc13ad7f86ccdbc1d5b2c07fd8e018a54fe7ad56eab3647ca9a54a833444d0f392fbe205b3e826c32b826bcb4847783ed061678513a7411b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}