{
  "manageEntity": {
    "action": "Save",
    "entityId": "1605090106",
    "entityType": "Track",
    "nonce": "0xa8689ff68386bd22811a4730e7cafd05c3cf6eb3b9dfbfd31c526798e00f3107",
    "signature": "0x29cc59890d2e9a9ef85cd34b61448084249d393f8b3ac706b1bac238268ec8516a3c22e5e7ab0bfe727fb7b32f319dcfb2594bcd78fd9c96b3b26fd8a350932c1c",
    "signer": "0x5A6DCd6E22135e4225594900c17114A7dAD01964",
    "userId": "580576096"
  }
}