{
  "manageEntity": {
    "action": "Save",
    "entityId": "105101",
    "entityType": "Track",
    "nonce": "0x4d39548b6be2b6d15ba306ec7f30381c0f2f824e19f40139ad46064f181dd2c5",
    "signature": "0xdc9e0b95e14204d7f684a55af286df86c2984edb3cca01c452ba5a144206930f74c60bacf4c547910ccf538a0e57cc6cf2132df704df917f029888bf1aedeece1c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}