{
  "manageEntity": {
    "action": "Save",
    "entityId": "445798",
    "entityType": "Track",
    "nonce": "0x9deed4b57dc7dc3af96e2f0bc697154424beea4aa8e535a5cac8d2f978f6bbb1",
    "signature": "0x6ef243b718da7de03ddd0c19d842390d2ca02985d33bf56bbe4e6f627332a0ec1db8f23322499198e5ccd33280322b5dae61f424b13bbba3804e67fefa3afc941c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}