{
  "manageEntity": {
    "action": "Save",
    "entityId": "987613",
    "entityType": "Track",
    "nonce": "0xcadcb4ed70f6c71f30c675af4b82e26ecd2543d3f01111688617a884181c6594",
    "signature": "0xd581bd842e10a52139fea413acc4ba6ab31a9d3c2ddf9b50c46e85e45e49e2433a9c1f018efa90b4f4ba52101a713a7ee49cc82979b70bed6b4a2636db13deea1c",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}