{
  "manageEntity": {
    "action": "Save",
    "entityId": "2077694972",
    "entityType": "Track",
    "nonce": "0x977245e594e46a9e840a1c612508bb6962bdfcc84a15a4745ae71b5f9da72750",
    "signature": "0xf33c786e12f8cb62e6992385d1652dccd4f26fb679d4b7af46399e822b017b8c636381a4c173f0915be368d486e4fb861da4f5e38ea80f1b5f569ebd97000be81c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}